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Operating instructions
MS-540 SE Voltage and magnetic field tester
Item no. 1692261
Intended use
The contact-less voltage and magnetic field tester is used to detect magnetic fields and alter-
nating electric fields. The tester is ideal for testing the functioning of inductors carrying
currents, such as relays, magnetic valves, etc. It can also be used to detect voltage in
insulated cables. The tester is contact-less and, therefore, direct contact with the test object
is not necessary. Thus, housings mostly do not need to be opened. If a magnetic field is
detected, the test tip lights up solid yellow. If an electric field is detected, the probe starts
glowing red or flashing rapidly in red depending on the measuring range, the device starts
vibrating and a sound alert can be heard. If electric and magnetic fields are detected
simultaneously, the yellow and the red LED flash alternately.
Additionally, the tester has an integrated LED lamp.
The non-contact voltage and magnetic field tester is powered by two micro-batteries. Do not
use any other power source.
For safety and approval reasons, you may not convert and/or alter the product in any way.
If you use the product for other purposes than those described above, the product may be
dam-aged. Furthermore, improper use may cause risks such as short-circuits, fire, electric
shocks, etc. Please read the operating instructions carefully and do not discard them. If you
pass the product on to a third party, please hand over these operating instructions as well.
Package contents
• Voltage and magnetic field meter
• 2 batteries of type micro / AAA / LR03
• Quick guide
Up-to-date operating instructions
Download the latest operating instructions via the link www.conrad.com/downloads or scan the
QR code. Follow the instructions on the website.
Explanation of symbols
The lightening flash symbol in a triangle warns against the risk of an electric shock
or interference with the electrical safety of the device.
An exclamation mark inside a triangle refers to important notes in the operating
instructions.
The arrow symbol indicates special information and advice on operating the device.
Continuous double or reinforced insulation of category II DIN EN 61140.
Safety instructions
Please read through the quick guide carefully before using the device. It con-
tains important information on its correct operation.
The warranty will be void in the event of damage caused by failure to observe
these safety instructions! We do not assume any liability for any resulting
damage!
We shall not accept liability for damage to property or personal injury caused
by incorrect handling or non-compliance with the safety instructions! In such
cases, the warranty will be null and void.
• The unauthorised conversion and/or modification of the product is not allowed for
safety and approval reasons. Do not disassemble the product.
• The product is not a toy. Therefore, be especially careful when children are around.
• The device may not be used for verification of voltage absence. Absence of volt-
age may only be verified by a bipolar voltage tester according to EN 61243-3.
• The audio signal heard, when voltage is checked, provides no reliable indications
as to type and level of the voltage.
Only touch the device by the handle areas provided for that purpose. Do not cover
indicator elements.
• Take particular care when dealing with voltages exceeding 30 V AC or 30 V DC!
Even at these voltages, there is a danger of fatal electric shock if you touch electric
conductors.
• Do not use the device in rooms or under unfavourable ambient conditions in which
there are or could be combustible gases, vapours or dust.
• Do not use in the immediate vicinity of:
- strong magnetic or electromagnetic fields
- transmitting aerials or HF Generators.
These can affect the results of the measurement.
• If a safe operation can no longer be assumed, the device must be put out of op-
eration and secured against unintended operation. Safe operation can no longer
be assumed if:
- the product exhibits visible damage,
- does not function any longer and
- the product was stored under unfavourable conditions for a long period of time
or
- it has been subjected to considerable stress in transit.
• Never switch the device on immediately after having taken it from a cold to a warm
environment. The condensation that forms might destroy your device. Allow the
device to reach room temperature before switching it on.
Do not disassemble the product!
• Do not carelessly leave the packaging material lying around, since it could be-
come a dangerous plaything for children.
• On industrial sites, the accident prevention regulations of the association of the
industrial workers' society for electrical equipment and utilities must be followed!
• Measurement instruments used in schools, training facilities, do-it-yourself and
hobby workshops should not be handled unless supervised by trained, respon-
sible personnel.
If you have doubts about how the device should be operated or how to connect it
safely, consult a trained technician.
• Please handle the product with care. The product can be damaged if crushed,
struck or dropped, even from a low height.
Regularly check the technical safety of the device e.g., for damage to the
casing or pinching of the cables, etc. The device may in no case be opened
or used, if the covers have been removed.
!RISK OF FATAL INJURY!
If you are not sure about the correct operation or if questions arise which are not
covered by the operating instructions, please do not hesitate to contact our techni-
cal support or another specialist.
Operating controls
1 Test probes for voltage check
2 Torch
3 Display range
4 Handle
5 On/off switch and sensitivity selector
6 Torch button
7 Battery lid
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